.i5-content {
  width: 100%;
  max-width: 1349px;
  height: 803px;
}
.i5-content .i5-change {
  width: 100%;
  max-width: 1349px;
  height: 100%;
}
.i5-content .i5-change .i5-img-list {
  float: left;
}
.i5-content .i5-change .i5-img-list > li {
  width: 25%;
  height: 270px;
  background: white;
  display: inline-block;
  margin: 0;
  margin-left: -5px;
  margin-top: -5px;
}
.i5-content .i5-change .i5-img-list > li .intro1 {
  width: 100%;
  height: 100%;
  background: rgba(255, 0, 0, 0.7);
  font-size: 28px;
  color: white;
  line-height: 270px;
  text-align: center;
}
.i5-content .i5-change .i5-img-list > li img {
  width: 100%;
  height: 100%;
  float: left;
}
.i5-content .i5-change .i5-img-list > li .first {
  width: 100%;
  height: 100%;
}
@media only screen and (min-width: 768px) and (max-width: 1024px) {
  .i5-content {
    width: 100%;
    height: 100%;
  }
  .i5-content .i5-change {
    width: 100%;
    height: 100%;
  }
  .i5-content .i5-change .i5-img-list {
    float: left;
  }
  .i5-content .i5-change .i5-img-list > li {
    width: 50%;
    height: 270px;
    background: white;
    display: inline;
    margin: 0;
  }
  .i5-content .i5-change .i5-img-list > li img {
    width: 50%;
    height: 270px;
    float: left;
  }
  .i5-content .i5-change .i5-img-list > li .first {
    width: 50%;
    height: 270px;
  }
}
@media only screen and (max-width: 768px) {
  .i5-content {
    width: 100%;
    height: 100%;
  }
  .i5-content .i5-change {
    width: 100%;
    height: 100%;
  }
  .i5-content .i5-change .i5-img-list {
    float: left;
  }
  .i5-content .i5-change .i5-img-list > li {
    width: 100%;
    height: 270px;
    background: white;
    display: inline;
    margin: 0;
  }
  .i5-content .i5-change .i5-img-list > li img {
    width: 100%;
    height: 270px;
    float: left;
  }
  .i5-content .i5-change .i5-img-list > li .first {
    width: 100%;
    height: 270px;
  }
}
